src/mathed/math_symbolinset.C

   1 #include "math_symbolinset.h"
   2 #include "math_parser.h"
   3 #include "support.h"
   4 #include "support/LOstream.h"
   5
   6
   7 using std::ostream;
   8
   9 MathSymbolInset::MathSymbolInset(const latexkeys * l)
  10         : sym_(l), h_(0) {}
  11
  12
  13 MathInset * MathSymbolInset::clone() const
  14 {
  15         return new MathSymbolInset(*this);
  16 }
  17
  18
  19 void MathSymbolInset::write(ostream & os, bool /* fragile */) const
  20 {
  21         os << '\\' << sym_->name << ' ';
  22 }
  23
  24
  25 void MathSymbolInset::writeNormal(ostream & os) const
  26 {
  27         os << "[" << sym_->name << "] ";
  28 }
  29
  30
  31 MathTextCodes MathSymbolInset::code() const
  32 {
  33         switch(sym_->token) {
  34         case LM_TK_CMSY:
  35                 return LM_TC_CMSY;
  36         case LM_TK_CMM:
  37                 return LM_TC_CMM;
  38         case LM_TK_CMEX:
  39                 return LM_TC_CMEX;
  40         case LM_TK_MSA:
  41                 return LM_TC_MSA;
  42         case LM_TK_MSB:
  43                 return LM_TC_MSB;
  44         default:
  45                 return LM_TC_SYMB;
  46         }
  47 }
  48
  49 void MathSymbolInset::metrics(MathStyles st) const
  50 {
  51         size_ = st;
  52         MathTextCodes Code = code();
  53         if (sym_->latex_font_id > 0 && math_font_available(Code)) {
  54                 mathed_char_dim(Code, size_, sym_->latex_font_id,
  55                                 ascent_, descent_, width_);
  56                 if (Code == LM_TC_CMEX) {
  57                         h_ = 4*descent_/5;
  58                         ascent_  += h_;
  59                         descent_ -= h_;
  60                 }
  61         } else if (sym_->id > 0 && sym_->id < 255 &&
  62                    math_font_available(LM_TC_SYMB)) {
  63                 mathed_char_dim(LM_TC_SYMB, size_, sym_->id,
  64                                 ascent_, descent_, width_);
  65         } else {
  66                 mathed_string_dim(LM_TC_TEX, size_, sym_->name, ascent_, descent_, width_);
  67         }
  68 }
  69
  70
  71 void MathSymbolInset::draw(Painter & pain, int x, int y) const
  72 {
  73         xo(x);
  74         yo(y);
  75         MathTextCodes Code = code();
  76         if (sym_->latex_font_id > 0 && math_font_available(Code))
  77                 drawChar(pain, Code, size_, x, y - h_, sym_->latex_font_id);
  78         else if (sym_->id > 0 && sym_->id < 255 &&
  79                    math_font_available(LM_TC_SYMB))
  80                 drawChar(pain, LM_TC_SYMB, size_, x, y, sym_->id);
  81         else
  82                 drawStr(pain, LM_TC_TEX, size_, x, y, sym_->name);
  83 }
  84
  85
  86 bool MathSymbolInset::isRelOp() const
  87 {
  88         return sym_->type == LMB_RELATION;
  89 }
  90
  91
  92 bool MathSymbolInset::isScriptable() const
  93 {
  94         return sym_->token == LM_TK_CMEX;
  95 }